Metal turning and truing machine



Feb.` 20, 1951 H. B. BARRETT 2,542,616

METAL TURNING AND TRUING MACHINE Filed Aug. 16, 1946 y 5 Sheets-Sheet 1 EFWMW Feb. 20, 1951 H. B. BARRETT 2,542,616

METAL TURNING AND TRUING MACHINE Filed Aug. 16, 1946 5 Sheets-Sheet 2 [Nl/Furore HAR/er 5 BR/@ETT Feb. 20, 1951 H. B. BARRETT METAL TURNING AND TRUING MACHINE Filed Aug. 16, 1946 H. B. BARRETT METAL TURNING AND TRUING MACHINE Feb. 2o, 1951 Filed Aug; 1e, 194e '5 Sheets-Sheet 4 HTTOA/EY,

Feb. 20, 1951 H. B. BARRETT METAL TURNING AND TRUING MACHINE 5 Sheets-Sheet 5 Filed Aug. 16, 1946 m e@ .y Z W 5. .m W5 T w A n Patented Feb. 20, 1951 .PATENT OFFICE l 2,542,616 y TURNING AND TRUIG MACHINE tHarry,B..l? arrett, vSt. Lo.u is, Mo.

Application VvAugust 16, 1946,-Serial No".'-"690,896

- :the: like, falthough'fthe fsarneg isnot necessarily .y limitedtosuch particularuse.

'lhe'objtcts of my inventonfgreside; in the-pro- ;zivisionr,of a.;.lathe for. machine of the-character noted whichf, is simp1e;..;durab1e: and economical -r in,` construction; which; is accurate .;and freliably preciseqin metaltturning operations, i which; is; ad- .,justable for; aigwide. variety,` of Work, fand'gvvhichjs f Auniversallyadaptable tdsituationsand, conditions f.;-.met:.in..actua1 servicessuch -asiturnina f grinding, l.truing andk y.vvork-surfacingaon.various types-.and f sizes'ofibrake-drums.

.ult is a'lfurtherzobiectofgmy present: invention to Vprovide a brakefdrum lathe which .canfbe readily converted from a 'stationaryzgtype of. machine' Q.; ,to aportable. machine, .sothat, as the particular -needsfothe yjob 4may require; the Work-may either .,.:be `brought -to themachine or z.the:=machine.;may -be.;br.o.ught; to the. .work and, z'furthermoregwhen lthemachine is brought to theworkgitisfcapable of; handling rbrake-drums. alone -z' with. the- :pneuf: matic .tirefremoved.from the/wheel or brakedrums; lon .-Wheels .f from; which: the.: tires.. have A notvr been @removed and which are; accordingly, supported .by,.-.theztire;1vvhee1 hubnor: rim,tfthus g.: providing afmachine which is. .capable .of.=.;meet

ingl prac-ticallyf every type of :brake-.drum turning :encountered in, automotive repair shops.

And with the :above and; other.r objects infvievv, army inventionfresides. rin thev novel features `ofy form,.f constructiom; arrangement,v and combinaf: tion. of .partspresently ldescribeclm-and pointed tout in the claims.

. -Inthe accompany-ing;drawings; (ve Sheets),

'Figure 1- is a perspective view of a lathe.- con-n.

ystructeol; in accordance with; and g embodying @my -f;:,.;-inv ention;

Eigure 2- is; an-endgelevationaleview, partly-:in

@section .fof the` outboardnsupport and trackfcaririagerassembly, fthegvewfgbeing italgen'atathe. zonef indicated `by line 2-2 in'Figure 1;

i Figure 3 is a side. ielevational'iview, k:partly-'in i' section,A y of the :outboard .support illustrated in :z Figure 2;

-f Figure 4-is aniend elevationalqv-iewfof the-.out--si 2 arfragmentarysectional eleva-tional viewfof the .z-same corner construction;

. AFigure '7.Y is an; enlarged zand partial l sectional elevational :vievvofl the mounting arbor, brake- 5; drumlcenteringemeans and adjustable disconnect :.:ilttingatfthefoutboard supportingmeans when l.assembled -and inoperative position with respect `tofthe lathe cutting toolassemblm ifFigure 8- is aview similar` to-.that of -thepre- .lceding illustrationy but-.indicating a modiiied ,e adjustable disconnectftting;

"Figure 9.y is a -fragmentaryiView; inelevatOIL-. of i etheginboardadjustable assembly =for=attaching the track=rneans-=vvith the` lathefstandardr thisrview w beigngvtaken at line 9f-9 in Figure l;

n Figure 10 is afurther sectional detail .vievvof the inboard adjustable attachment means .for-the i-.tracl assembly-as :seen along line iIIL-TH) infligiure 9; Figurefllis a perspectiveview ofmy invention 1j;illustratingthefsame in a `form adapted; for portv. ability of fthe-entire assembly-.auditor adjusting --Df its maj or components;

I; yFigure 12- is a fragmentary 1 elevational view. of 125 apart of the fassemblyfshown in `vFigure 11; and v `Figure .-13 is, af-perspectivev-v-iew of the portable arrangement of: mypresent inventionset up for froperation'upon-the brake-drumfof a Wheelffrom :1 whichthetireand Wheel. have not been removed.

..30 Referringnovv in morevdetaiLzand by reference characters to thedrawings, Adesignates abrakedrum lathe comprising-an operating headfl Asuitably emountedvon afbase or standard I6 @adapted-to Vrest` on a.-leve1 floor or-,support In co-operation with the based 6- is atrackway .B :connected vvith-the Abase meansel at one of` its zendsandsupported in a :level position-by aleglikeend-frame orsupport l1.

f Provided -for shiftable movement Valong the vtrackway B toward and avvayfrom the-'lathe A "is `agmovable voutboard carriage assembly Cl which, f-in co-operation vvithcertainother parts :and elements ofthemachineflater-'tube noted is adapted i to c arry-tthe--brakefdru-mgD upon which it: is de- 1145 sired'y to iperform a nturning;-;truingf,. grindingi or ..1s11rfacing operation.; In other words, the lathe Y.operating head` isxedfandthework or object :i .to be-'operated upon is movedor fed into or away from the lathe. Itzisalso essential that the ;ma- `..chine Vbe arranged with the Ltrack-'Way .assembly in level position and that .the axis of the lathe -,arbor. and itsoutb-oard supportxbeexactly in lalignment with and.` parallel to the track for -pur- :iposes of greaterlaccuracy offresults.

i TheV operating :ihead l 5. `is more :fullyxicldescribed 3 in United States Patent No. 2,357,803, and generally comprises a housing 22 in which are operatively mounted power transmission gears (not shown), an axially or longitudinally shiftable arbor 23, a switch panel 24 for mounting controls whereby to regulate current iiow from electrical supplyv line 25 tc the motor (not shown) assoelated with the transmission gears, manually operable crank means 26 for moving the arbor 23 when desired, and a tool carrier 2l' suitably slee'ved on the arbor adjacent the housing 22 and operatively connected with the transmission gears therein for rotation concentrically about the arbor in a selected plane. rlhe arbor 23 is adapted to extend through the housing 22, tool carrier 21 and the object or brake-drum D for connection with the outboard support or base means C as will appear presently. Therefore, and in order to cause movement or feed of the brake-drum D into the lathe, the rearward portion of the arbor 23 which passes through transmission housing 22 is formed with teeth 23 which are engageable with a suitable pinion gear (not shown) in such housing for the purpose of providing mechanical feed thereof longitudinally through the housing and tool carrier 21. Simultaneously with the longitudinal movement of arbor 23, the tool carrier is rotated so that the tool post or arm 29 with its cutter thereon may rotate relative to the brakedrum D. The arm 29 is detachably secured to the carrier 21 and,'further, can be moved relative thereto by means of a cross-feed device indicated generally at 3l, but which embodies the usual type of threaded shaft (not shown) operatively engaging the carrier 21 for effecting movement of the arm 29 in a direction normal to the axis of arbor 23.

The housing 22 is preferably integrally formed with a transversely bored depending lug 32 adapted to fit between similarly bored, upstanding ears 33 on base i5, and is pivotally mounted thereon by a removable pin p extending through the lug 32 and the ears 33. Also integrally formed on and depending from the housing 22 is a foreleg'34 having spaced ears 34 for embracingly engaging a retention boss 35 formed on and projecting upwardly from the base i6.

' Track-way B (Figure l.) comprises a pair of spaced and longitudinally extending rails 36 formed of channel shaped members having the anges directed outwardly and set in a horizontal plane so that the upper flanges constitute the track tread. The rails 36 are secured in assembly by a cross-bar 31, a plurality of intermediate cross-rods 33 spaced along the length of the track, and the end frame i1. The end frame I1, as more particularly disclosed in Figures 4 through 6, integrally comprises a cross-member 39 and two vertical legs 43. At its ends, the cross-member 39 is bolted to the rails 36, as at 4l, and has a sliding engagement with the endmost tie-bar 38, as by the notched formation or recess 42 formed in each of a pair of spaced and inwardly extending projections 43 integrally provided on the frame for that purpose. Each of the legs 4D carries at its floor engaging end van adjustable foot element 44 threaded into the leg for permitting the requisite amount of vertical adjustment of the track in obtaining a level position thereof. A lock nut i is utilized to retain the foot element in adjusted position.

As disclosed in Figure l and in detail in Figures 9 and IG, the inner end of the track-way B, and more particularly the cross-bar 31, is formed with spaced bosses 41, each of which is recessed at 48 to receive, in sliding relation, the upper end of an adjustable element 49 carried on the base I6, as shown. Each element 49 is threadedly received in a bracket plate 50, the latter being rockably mounted upon the forward face f of base I6 by means of bolts 5|. Bracket plate 5B is angularly adjustable relative to the base I6 by means of a plurality of set screws 52 which can be threaded toward or away from the base side wall to move the upper flange 53 of plate 55 into a horizontal or level position. In the arrangement disclosed, each element 49 is mounted in a laterally projecting boss 54 of plate 50 and is capable of vertical adjustment with respect thereto. A locking nut 55 secures each of these elements in final position, while a second nut or abutment element 56 carried by each thereof is arranged thereon to be engaged by the cross-bar 31. It can now be seen that each end of the track-way B is capable of vertical adjusting movement so that an accurately leveled position can be obtained. Moreover, the track-way B can be ad- Llil justed to be parallel with the lathe arbor, regardless of the fact that it may not be truly level.

Turning now to Figures 1, 2 and 3, it can be seen that the outboard carriage assembly C includes a movable base member 58 formed with corner bosses 59 for supporting axles 60 upon which flanged wheels El are rotatably mounted to engage the track elements 36, and a centrally located, upstanding pedestal column 62 having a central bore 63 and a vertical slot 64 provided on opposite sides with ears 65, 56, for the purpose of permitting the two parts of the pedestal column to be moved or flexed in clamp-wise manner upon proper manipulation of a lever 61 which is rotatably mounted in boss 65 and threadedly engageable in boss 65, whereby the bifurcated pedestal column can be flexed into and out of engagement with a post 68 which is thus adjustably mounted in the column 62 and at its upper end is provided with a yoke fitting 10 fixed therein by pins 1 I. Each arm 12 of the yoke is apertured to receive a pin bearing 13 which projects inwardly for engagement in recessed and laterally projecting boss formations 14 on a bearing sleeve 15 to allow for pivotal movement of the sleeve 15 in a vertical plane about the axis of pin bearings 13. In turn, the pivotal sleeve 15 carries a tting element 13 of the type having an internally threaded collar 11, an integral bearing sleeve of reduced diameter 18, and a pair of diametrically opposed and outwardly projecting locking pins 19 positioned adjacent the outer end of the bearing sleeve 13. 'I'he pins 18 are urged outwardly into locking position by means of a resilient element or coiled spring 80 engageable with the butt ends thereof (Figures 2 and 7) while the outer ends of these pins are rounded oi to act as cam surfaces such that, upon movement of the fitting into or out of sleeve 15, the pins will be cammed inwardly to permit passage therethrough of the bearing sleeve. In its operative position, the fitting 16 is free to rotate in sleeve 15 but is normally held against axial displacement due to the pins 19 at the outer end and the shoulder formed between portions 11 and 18 thereof. In addition the iitting 13 is formed with a pair of cross bores 8l, in 90 relation, for the reception of a turning tool 82 whereby the tting may be threaded upon or released from engagement with the outboard threaded end 83 of the lathe arbor 23, as will presently appear.

its

column 'i6 2vv zand. :arrangedA rior-i translatory :movement on carriage or truck .Saga-andiitslfittingfl isa'dapted: 1to1-support stheffoutboarduend 83 of lathe v`arbor 2 3,. as fbythe. threadedconnectionbetweeiifthel end'off the varbor .and-the sleeve?? 'l J'Butf f prior to. thisconnection beings-made; the:y brakefdruinf D is lrst moved:intoiapproximate; 'position r. on the: arbor .2%. f': In raccomplishingilxthis:ilatter :operation an innen! centering l-conel 85 isslipped onto" the arbor and isrpositioned in.abutmentwith ai seatv formed by. a1: flanged. shoulde'rzf. 'The f. `brake-'druin'D is .then :passed over the arbor until fftheinnerr-endf off its .central bearingL aperture a rests on the inclined face ofth'e-I-conef 35S-ft is "understood, "ofcourse, thatceneror any equivr alent means should beselectedffrom atnumber of :.f'graded sizesand. shapestesuitfthe dimensions l 'of ,the vsurface Vof engagement: on -the'-v particular ubrakedruni D. i Asecondf'coneflg/.or equivalent means', is next brought. into -Jposition ladj acent rthe .1; .outer surfacev of the ibrake-drurn.D,afollowed by .an',:adapter :sleeve 88: which. abutsnagainstf rthe -.latter.zcone,"the lengthfof adapter i'being selected to provide aV suicient iprojectiono'f! thai arborY end f S83 outwardlyfthereoi fori.threading` engagement; :.'Within the `sleeve '11' oillttingff 16.\ After'this @approximate assembly .hasfbeenfcarried out, the '.toolfzA isV 'utilized'.-- to'turny collar "ll Y upon the arborfuntilfadapter sleeve'iBSA-has' pressed cone'l :into a hrm-'seat with :brake'-clrurnV Dfit being :une f derstood that the innerrcome?ES-Willalsoahave a iflrm seat withlilangeA 861and alsofwith the .inner :margin ofthe aperture a.

z-Ini practice, :.thei above described llathe Vtype machine is. initially'ilsetr up andconditioned' for turning,"`l tru-ing: orfigrindingnworklfbyv adjusting f the track-way B so that it isrbrought intoparallelismzwith. the axisfof. arbor:23,sbyI vertical-adjustment of fpos't :Q5 of: -assemblyfl 3 whereby `.the

y-icollar` 'llofttingf '5S is, in'truefaxial alignment with the arbor. irAccompli'shing-thisgthelbrake- JdrumD can be moiinted--upon thearboi 231a`nd clamped in 4position as-"pointed out; Thereafter, the arbo1.223` is :longitudinally shifted manually by crank 26 until the lathe tool or ily-cutter t is set for the-#proper Adepth-of cut." At this point,

.e 1 electrical-:I current. @can 1beifsupplied:,toritheza lathe motor (not shown) and thesmachinefivillzfunction automatically to-.rotate thecutting' tool and feed theV arbor axially inwardly to move the Work toward. the cutter. It wilL-'of course, be under- 'istoodthat -the-arbon 23 ahd rbrake-drum` D do r ynot rotate: but simplytmove longitudinallyi thus causing 1 carriage C-A to v roll inwardly along' the ."tracks 36 duringiithe operationof the machine.

" `Thebrake-drum-lathe of -thefpresent'invention "1maylbef1readily converted into afportableforrn; as

illustrated in Figures 1l, 12, and 13, wherein the working head or power operated tool and arbor assembly l5 is substantially identical with thev form disclosed in Figure 1. The essential dinerence of this second arrangement over the rst described form resides in the utilization of a base assembly which is in the form of a frame 94 7V-fhavingierect:xmountingmcsts-afll'n'npcm wvliichsan elevator carriagei nisslidably Amcuntedifor :ver-

tical: wcrk'alignina adjustment ofrthesassembly M'overnentfoftthe` carriagee is had'zthrough a ack:shaft ;9'Ly arranged-to `turninlfplacein framacfl gandc'thread through.: azzzsuitable frboss f f (notxifshownhfformed ati-.the =reari ofJthe': carriage afcasting-F96.tf lramei; 9d: :hasLangedviwheelsi98 Whicheengagertrackmembersggyof :the trackeway 103.01' frame'assembly IUI) fortranslatorymovement therealongziwhen sodesired: The outboardk sup- :zport carriage ."Cfr of :this :present arrangement comprises azbase lmeans yor carriage in the` form ofafzcasting ."I ll'tirhaving;fflangedilroller 'elements f. :5I B2 fors engagement" with thez'tracksi 99; iandian :aipstandingzpedestal :[03 for 'adjustable :support r; "of :theimoste the latter :ebeingi: fully'fidescribed czinzcconnection witha'liigures 2 :and 3 .-Postc .carries-cthezpitoted; ssleeyedA head 'l5and ntting w .-16 tovwhichfthe:workzsupporting x:end of `arborf23 is secured when an object, such as that shownat i :D: ini-Figure 13 isproperly :positioned: for 'a .Work

operation.

" "Ihre ftr'ack'lframe .assembly l UQ kis constructed v fonstherpurpose .of "rendering itk easilyv portable andi comprises rails .esrsecured in spacedfparallel ,fr'elation'by a numberof ithebarstl, a rpair of handlel members l 06 fsecuredfagainst .the 'web oftthetrack` elements;i aspre'aden member 4I 01 at thetopposite :endsaof the track elements from r; yhandles 1:1106 andrfveiticalljz-.oiset armsifl G Secon- .nectedto theweb:offthetrackrelementsadjacent -iirtheispreaderfmember :l 012 v'lia'ch1garr'-1 08: mounts a roller element or Wheel |09 upon whichithe r: whole machine'canspbe transportedwhen sol. de-

^ sired.v` tas-indicated in=Eigure 2y-:each :arm "Il |38 is vertically: ollset sucht thatfits wheel? 109 ,nor- '-mally is'fheld-out of contactfwith the floor or 'f supporting surface` -whilei-thetracks 'are resting 140 thereon. "I-Ioweveryewhen "fthe #track frame` VI BEI fis; bodilyfelevated orf-lifted* byfthe handles vIllli the-frame I:temporarily rpivots abouty the lower Yedge-ll0 'of the'tracks-9e'until wheelml'can a be brought into rolling vengagement Withfthe floor K. to carrytheweight ofthe-machine? This feature is-advantageous--inf thatf-the1machine is 'rendered 1 immobile :while i theftracksh are-s resting at iull e lengthfgon inthe-zfoorfforsupporting rsurface. At other times the machin-excan-fbe transportedy from place to-placewithouttirnposing aload atfthe l handles# 96 4'which' will :befbeyond fthe 'capability ofthe avenage individual to lift.

VA'In rfurtherancew of:Y thea-universal# adaptability c :of myc-invention; 'fther memben'l 01 is formeelA with tvertical clamping'jelements-Hl which arezdirected f1 tozoverhang-the framefll adj acent' the :rear track vzwheels: fsuchzthate clampscrews l |'2 :threaded iithereinmayzengagethegframefand 4prevent its wmovement't alongffthevztracksi @99. Likewise the 6urcarriage :l 0 Ivmay-bei :clamp'edtolfthe tracks`A y99 .frthrou'ghappropriatetadjustment of hooked straps if 31carried?.therebyforf'sliding movement relativef.; to'v as.. clamp'i` screwil fl IE: threaded.' into the ercarriage;l I l v-l"(Dperationfrofthis.lattensassernbly is #capable :fofisomewhat greaterfexibilityas either'the lathe ahead f'orthe:outboardsuppcrt'carr-iagei C. may rbe timniobiliz'edfa'relative-L: tol?l the@l tracks?v SSwand operation of the lathe will effect feeding movement of Whichever of such members is free, so

that the fly-cutter t may be fed into the work or the Work may be fed to the cutter, whichever is most suitable.

Where it is desired to turn the brake-drums on truck wheels where the tire and Wheel assembly is relatively large and heavy, the brakedrum lathe in its portable form may be rolled over into close proximity to the Wheel or the wheel may be rolled over to it, whichever is most convenient. In either case, the Wheel W with tire attached, as shown in Figure 13, is set down and cradled, so to speak, between the rails 99 which serve to hold it in upright position. The arbor 23 is then brought into substantially accurate alignment With the center line of the brake-drum II by elevating the carriage casting 96 and its associated operating head i5 by suitable rotation of the threaded jack shaft 91. The arbor 23 is thereupon secured concentrically in place by suitable centering cones H6, substantially similar to the previously described centering cones 85, 81, and the clamp screws H2 released, so that the frame 94 may be free to move toward the wheel W and the operating head will thereby in effect feed itself into the work.

Moreover, in a machine of the type herein disclosed, it is obviously possible to substitute for the y-cutter t shown a grinding wheel, hone element, or the like, whereby the machine can be readily made to perform a variety of duties in connection with wheel brake-drums and the like. While the foregoing detailed description relates to presently preferred arrangements for the subject machine, it will be clear that modifications, rearrangements, and substitutions may be made Without departing from the scope of my invention as defined in and by the claims hereto annexed.

Having thus described my invention, what I claim and desire to secure by Letters Patent ist 1. A lathe comprising, in combination, a supporting structure providing a base, an extended track-way, an operating head carried on said base and having a work-carrying arbor movable longitudinally through the head in the direction of, and parallel to, the extended track-way, a Work-surfacing tool rotatably sleeved on said arbor, a bracket plate rockably mounted on one face of the base, adjustable elements on the inner end of said track-way engaging said bracket plate, and a vertically adjustable support frame adapted to rest on a fixed surface provided at the cuter end of said track-way.

2. A lathe comprising, in combination, a supporting structure providing a stationary base, an extended track-Way, an operating head carried on said base and having a Work-carrying arbor movable longitudinally through the head inthe direction of, and parallel to, the extended trackway, a work-surfacing tool rotatably sleeved on said arbor, means movable along said track-way adapted for connection with one end of said arbor in support thereof during a work-surfacing operation, a bracket plate rockably mounted on the face of said base adapted for angular adjustment relative to said base, the lower ends of vertically adjustable elements threadably received' in the upper face of said bracket plate, the upper ends of said vertically adjustable elements engaging the inner end of said track-Way, a support frame adapted to rest on a fixed surface provided at'the outer end of said track-way, and vertically adjustable means provided in the lower ends of said support frame.

3. A lathe comprising, in combination, a supporting structure providing a base, an extended track-Way, an operating head carried on said base and having a Work-carrying arbor movable longitudinally through the head in the direction of, and parallel to, the extended track-Way, a

bracket plate rockably mounted on one face of the base, adjustable elements on the inner end of said track-Way engaging said bracket plate, and a vertically adjustable support frame adapted to rest on a fixed surface provided at the outer end of said track-way.

4. A lathe comprising, in combination, a supporting structure providing a stationary base, an extended track-Way, an operating head carried on said base and having a work-carrying arbor movable longitudinally through the head in the direction of, and parallel to, the extended trackway, a bracket plate rockably mounted on the face of said base adap-ted for angular adjustment relative to said base, the lower ends of vertically adjustable elements threadedly received in the upper face of said bracket plate, the upper ends of said vertically adjustable elements engaging the inner end of said track-way, a support frame adapted to rest on a fixed surface provided at the outer end of said track-way, and vertically adjustable means provided in the lower ends of said support frame.

5. In a lathe, in combination, a supporting structure, providing a stationary base, an operating head carried on said base, a Work-carrying arbor provided on said operating head yand movable longitudinally therethrough, a track-way extending laterally from said base, a bracket plate rockably mounted on said base, adjustable elements provided on the inner end of said track- Way for engagement with said bracket plate for permitting vertical adjustment of said inner end of the track-way, a vertically adjustable support frame adapted to rest on a fixed surface provided at the other end of said track-way, an outboard carriage slidably disposed upon said track-way comprising a base, a vertically adjustable post, and a bearing sleeve adapted for detachable connection with said arbor whereby said outboard carriage may be moved along said trackway to and away from the stationary base in response to movement of the arbor, said arbor being maintained in parallelism with said trackway by means of the adjustable element and vertically adjustable support frame.

HARRY B. BARRETT.

REFERENCES CITED The following references are Yof record in the le of this patent! UNITED STATES PATENTS Number 

